我正在构建一项服务，如果位置在一段时间内没有改变一定米数，我会知道。
然后事情是我的onLocationChanged监听器上有事件..但我不知道如何做相反的事情..也就是说，如果位置在我提供的几分钟后的距离内，则发送广播。
这是我到目前为止的代码
定位服务
public class LocationService extends Service {
public static final String LOC_INTENT = "com.xxx.intent.action.LOCATION";
private Thread triggerService;
protected LocationManager locationManager;
protected MyLocationListener MyLocationListener;
protected Criteria criteria;
public static final int MIN_TIME = 300000; // 5 Minutes
public static final long MIN_DISTANCE_MOTOR = 50; // 50 Metres
private SharedPreferences settings;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
settings = getSharedPreferences(getString(R.string.settings_prefsName), 0);
addLocationListener();
return START_STICKY;
}
private void addLocationListener()
{
triggerService = new Thread(new Runnable(){
public void run(){
try{
Looper.prepare();//Initialise the current thread as a looper.
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
final String PROVIDER = locationManager.getBestProvider(criteria, true);
updateLocation(getLastBestLocation(MIN_TIME, MIN_DISTANCE_MOTOR));
MyLocationListener = new MyLocationListener();
locationManager.requestLocationUpdates(PROVIDER, MIN_TIME, MIN_DISTANCE_MOTOR, MyLocationListener);
Log.d("LOC_SERVICE", "Service RUNNING! ("+PROVIDER+")");
Looper.loop();
}catch(Exception ex){
ex.printStackTrace();
}
}
}, "LocationThread");
triggerService.start();
}
public Location getLastBestLocation(int minDistance, long minTime) {
Location bestResult = null;
float bestAccuracy = Float.MAX_VALUE;
long bestTime = Long.MIN_VALUE;
List<String> matchingProviders = locationManager.getAllProviders();
for (String provider: matchingProviders) {
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
float accuracy = location.getAccuracy();
long time = location.getTime();
if ((time > minTime && accuracy < bestAccuracy)) {
bestResult = location;
bestAccuracy = accuracy;
bestTime = time;
}
else if (time < minTime && bestAccuracy == Float.MAX_VALUE && time > bestTime) {
bestResult = location;
bestTime = time;
}
}
}
return bestResult;
}
public static void updateLocation(Location location)
{
Context appCtx = MyApplication.getAppContext();
double latitude, longitude;
float speed;
latitude = location.getLatitude();
longitude = location.getLongitude();
speed = location.getSpeed();
Intent filterRes = new Intent();
filterRes.setAction(LOC_INTENT);
filterRes.putExtra("latitude", latitude);
filterRes.putExtra("longitude", longitude);
filterRes.putExtra("speed", speed);
appCtx.sendBroadcast(filterRes);
}
class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location location)
{
if(settings.getBoolean("active", false))
updateLocation(location);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
}